∵y=x2-2x-3=(x-1)2-4,
∴抛物线对称轴:x=1,顶点坐标(1,-4),作图如图所示.
求抛物线y=x2-2x-3的对称轴和顶点坐标,并画出示意图.
求抛物线y=x2-2x-3的对称轴和顶点坐标,并画出示意图.
数学人气:458 ℃时间:2019-10-10 05:10:51
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